Gemstone



FIG. 1 is a front elevational view of a gemstone showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof; and,

FIG. 6 is a perspective top view thereof. 

CLAIM The ornamental design for a gemstone, as shown. 